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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 547 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.9 + ? = 10
  2. 2.39 + ? = 100
  3. 3.6 + ? = 10
  4. 4.53 + ? = 100
  5. 5.69 + ? = 100
  6. 6.46 + ? = 100
  7. 7.38 + ? = 100
  8. 8.45 + ? = 100
  9. 9.42 + ? = 100
  10. 10.2 + ? = 10
  11. 11.22 + ? = 100
  12. 12.61 + ? = 100
  13. 13.49 + ? = 100
  14. 14.1 + ? = 10
  15. 15.4 + ? = 10
  16. 16.7 + ? = 10
  17. 17.8 + ? = 10
  18. 18.3 + ? = 10
  19. 19.37 + ? = 100
  20. 20.78 + ? = 100
  21. 21.79 + ? = 100
  22. 22.76 + ? = 100
  23. 23.31 + ? = 100
  24. 24.52 + ? = 100
  25. 25.74 + ? = 100
  26. 26.51 + ? = 100
  27. 27.15 + ? = 100
  28. 28.64 + ? = 100
  29. 29.23 + ? = 100
  30. 30.57 + ? = 100
  31. 31.32 + ? = 100
  32. 32.85 + ? = 100
  33. 33.77 + ? = 100
  34. 34.5 + ? = 10
  35. 35.63 + ? = 100
  36. 36.24 + ? = 100
  37. 37.83 + ? = 100
  38. 38.13 + ? = 100
  39. 39.19 + ? = 100
  40. 40.20 + ? = 100

Answer key

  1. 1
  2. 61
  3. 4
  4. 47
  5. 31
  6. 54
  7. 62
  8. 55
  9. 58
  10. 8
  11. 78
  12. 39
  13. 51
  14. 9
  15. 6
  16. 3
  17. 2
  18. 7
  19. 63
  20. 22
  21. 21
  22. 24
  23. 69
  24. 48
  25. 26
  26. 49
  27. 85
  28. 36
  29. 77
  30. 43
  31. 68
  32. 15
  33. 23
  34. 5
  35. 37
  36. 76
  37. 17
  38. 87
  39. 81
  40. 80

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